Escapement mechanism.



0. MOGANN.

ESCAPEMENT MBGHANISM. APPLIQATIOH HLM) 3110.6, 1910.

$879153., .Patented Mgr; wm.

2 SHEETS-*SHEET Z.

WIYVESSES C1, /f/ M Omwum 77@ N nnirn- I stares rarnnr lorries.

OWEN MGCANN, OF LOUISVILLE, KENTUCKY.

i' SCAIPEMENT MECHANISM.

To aZ//fuilwm' 'may concern:

Be 1t known that l, OWEN M CCANN, a

citizen of the United States, 'residing atl Louisville, in the county ofJeffersonand State of Kentucky, have invented certain new and usefulImprovements in Escapement Mechanism, ofvvhich the following is a`specification.

This invention relates to typewriters and other machines having acarriage which is fed forward in a step-by-stepmanner by .-umeans of aspring or other'suitable motive power, an escapement controllingsuchmovement of' the carriage.

rl`he invention relates more particularly to the eseapement, its objectbeing to provide an improved mechanism of this kind whereby a variablefeed of the carriage is obtained. l

The invention consists .in a novel construction and arrangement of partsto be hereinafter described and claimed, and in order that itmay bebetter iinderstood, ref-` erence-is had to the accompanying drawings'forming a part of this specification.

The preferred embodiment of the invention has been shown and described,but it will be understood that various minor changes in the structuraldetails may. be resorted to without a'dcparture from the invention. ltis also tov be understood that the, invention is not limited totypewriters, butt-hat it may be readily applied to perforating and othermachines having a traveling lcarriage which is to be fed forward.

inthe drawings-Figure l is a perspective viewbf the entire mechanism;Fig. 2 is a plan view of the mechanism applied to the machine, afragment only of the latter being shown; Fig. 3 is a longitudinalsection of the parts which co-act-with the feed rack of the carriage;Fig. 4 is a plan view thereof; Fig. 5 is a cross section on the'line 5 5of Fig. 3; and Fig. 6 is a perspective view of a portion of the'mechanism.

Referring specifically to the drawings, denotes a fragment of the frameof the machine to which. the linvention is applied. The feed mechanismonly has been shovvn, all other parts being left off for the sake ofclearness, they forming no part of the present invention. The carriage11 travels-on rails 12 and carries a feed rack 13. Avveight la isconnected bya .line l5 to one end of .55 l

the feed rack, said line passing over. a guide pulley 16. y The Weightserves to feed the Specification of Letters Patent. Pat-911139@ B131',21, 1911 Application led December 6, 1910. Serial No. 595,880.

Beneath the feed rack, in close proximity.

thereto, is located a bracket 17, said bracket being secured in asuitable manner to the One end of the bracket sup' frame n l0. ports arotary shaft 18 on which, is rotatably mounted a sleeve 19, thelatterheing supported by the other end vof the bracket. The shaft andsleeve lie parallel to the feed rack. On one end of the sleeve is atooth Q0 which is adapted to engage the teeth of the feed rack. Theshaft, adjacent to this end ofv the sleeve, carries a sleeve 2.1 whichis provided with a number of steps Q2, said sleeve being fixed totheshaft so as to turn therewith. rIhe internal diameter lof the sleeve 19is greater than the diameter of the shaft 18, and on the shaft is asecond sleeve 23 which is loose thereon and'also fits loosely Within thesleeve 19 sovthat it is free to move lengthwise on the shaft 18. Thesleeve 23 has a tooth Qet on one ofits ends which is also designed. toengage the teeth of the feed rack, and to one side of the tooth 20 theend of the sleeve has a notch.

25 adapted to be entered by the tooth- 24, said tooth when thus locatedin the notch being on one side of the ytooth 20, in alinement therewith,and close thereto. The steps 22 are in the path of the tooth 24. Toprevent relative rotation of the sleeves 19 and Q3, the former :has alongitudinal slot 2G into which extends a4 pin 27 carried l by thelatter. The end of the sleeve 23, op-

posite its toothed end is engaged by one end of a spring` .28 which iscoiled around the shaft 18 within the sleeve 19, the other end of thespring abutting against a shoulder in said sleeve 19. Gn the shaft 18 ismade fasta pinion 29, and on the sleeve 19 is l,

is not actuated untilit is engaged by the levers, it will be seen thatthe'extent'of the swing of the yoke is variable. The "key which isabove` the lovvestistep imparts va.q

minimumA swing to the yoke, v"and the key which is above the higheststep imparts a clear.

`maximum swing to the yoke. The purpose of this construction will bepresently made The number of keys corresponds to the' number of steps 22.

To a bracket 35 mounted on some fixed portion of the machine. isfulcrumed a bellcrank lever36 having one of its arms connected by a'pin-and-slot connection to one of the side arms of the yoke 33. Theother arm of the lever is connected to a rack bar 37 which is slidablymounted'x in suitable guides onthe machine. The pinion 29is in m'eshwith this rack'. The pinion 30 is in mesh with a rack bar 38 whichisslidably mounted-in'guides similarl to the rack bar 37.

Beneath the yoke 33 is located av second yoke 39 which is so locatedthat-it is actuated by the yoke 33 when the latter has reached nearlythe end of its downwardtravel. The yoke 39 is also fulcrumed'l to afixed part of the machine, and one of itsside arms has an arm 4() towhich the rack bar 38 is connected. Upon depressing any one of the' keys31, the yoke 33, through the corresponding lever 32, is swung downwardlyand by reason ofthe connection between said-*yoke and the rack bar 37,the latter is` moved lengthwise and thus actuates the pinion 29. At theend of the downward swing? of the yoke 33, it engages the yoke 39 andjalso swings the same downwardly, thus rotating the .pinion 30 throughthe rack bar 38,-

by reason of the connection of the latter with the yoke 39. The two rackbars move 'in opposite directions, and the pinions are therefore rotatedin opposite directions.v

Across the top of the levers 32 extends a stop bar 41'which limits theupward swing of their ends which are provided with the keys 31. Arestoring spring 42 is provided forreturning the levers upon beingreleased after having been depressed. This spring may be connected toone of the side arms of the yoke 33. The. yoke 39v also has a restoringspring 43.

'The operation of the escapement is as follows: The tooth 24is normallyin engagement with the feed rack 13 and locks the carriage. To feed thecarriage, Ykey 31 corresponding to the number of spaces which it isdesired that the carriage move, is depressed, whereupon the pinions 29'and 3()v are rotated in opposite directions through the yokes 33 and 39and the rack bars 37 and 38, as already described. The pinion 29 .isactuated before the pinion 30, as the yoke 39 is not actuated until theyoke 33 has reached the end of its downward swing. :Consequently lthefirst movement is the'i'otation' ofthe shaft 18 through the pinion 29;This places one of the steps22- direct-ly in thev the pinion 30 and rackbar v38, whereupon` the sleeve 19 lis rotated, thus tooth placing thetooth 2O in engagement therewith. As soon as the tooth 24 leaves thefeed rackit is 'shot.forwardly, out of the notch 25', in thedirection ofthe lenethffof theI feed rack, by the spring 28, until it is stopped b vthe step 22, as shown in Figs. 1, 3 and 4. The key 31 is now released,whereupon the springs 42 and 43 restore the parts to their normalposition. During this move` ment-the sleeve`l9 is rotated in a directionto disengage the tooth 2O from the feed rack and simultaneous therewithto engage the tooth 24 with the feedrack. The weight 14 now pulls.the'carriage forwardly, the tooth 24 being carried along by the feedrack and stopping the carriage when it renters the notch 25. Thecarriage thus travels forwardly the distance the tooth 24 was placedahead of the tooth 20. The stepped sleeve 21 determines this distance,and is controlled' by the keys 31. The key 31 selected thereforedete-rmines the number of spaces the carriage is moved. Thus, if thc keyof the lever 32, which imparts a maximum swing to the yoke 33, isselected, the shaft 18 is carrying the 24 away from the feed rack 13andv the tooth 24 the step which is farthest from it during its normalposition within the notch 25. By thus selecting the keys, a va riablefeed of the carriage isv effected. One

tooth does not leave the feed rack until the other tooth has engaged thefeed rack, so that the carriage is always under cont-rol of the device.The vmovement of the teeth to release and lock the carriage istransversely of the feed rack.

I claim:

.1. In an escapement mechanism, thecombinationwitha carriage, having afeed rack and feeding means; of holding members alternately engageablewith'the rack, one of said members normally'engaging'the feed rack, andbeing slidable'in the direction of the length ofsaid feed rack in onedirection when disengaged therefrom, and in the opposite direction ,uponagain engaging the same, stops between which said member is slidable,one of said stops being fixed, andv the other stop being a rotatablemember having ay series-of stops which are spaced different distancesfrom` the Xed stop 'to determine the extent of the iirst-mcntionedsliding movement of the holding` member,

means for imparting a variable rotary m0vement to the aforesaid stopmember to place a selected stop thereof into operative position.. ,l

2. 1n an es capement mechanism, the combination with. a` carriage havinga feed rack and .feeding means; of holding members alternatelyengageable with the vrack,'one of said members `normally engagingthefeed rack, and beng'slidable in the dlrection of the length of said feedrack in one ldirection when disengaged therefrom, and in the op--positodirection' iipon again engaging the same, stops between Which saidmember is slidable, one of said vstops being fixed, and the other stopbeing a rotatable member having a series of stops which are spaceddifferent` distances from the fixed stop to determine the extent of thefirst-mentioned sliding movement of the holding member, means forimparting a variable rotaryY Inoveinent. to the aforesaid stop member toplace a selected stop thereof into operative pesition, said meanscomprising a pinion on the rotatable member, a rack in mesh'yvith thepinion, a pivot/ed member operatively connected to the rack foractuating the same, and having a stepped portion, andy key-leverslocated above the steps ofthe pivoted member, and adapted to engage thesaine to impart a variable swing to said member.

3. lIn an escapeineiit mechanism, the coinbination with a carriagehaving a feed rack and'feeding means; of holding members alternatelyengageable with the rack, one of said members normally engaging the feedrack, and being slidable in the direction ofy the length of said feedrack in'one direction When disengaged therefrom, and inthe op positedirection upon again engaging the same, stops between which said memberis sli'dable, one of said stops being fixed, and the other stop being arotatable member having a series of stops which are spaced differentdistances from the fixed stop to determine the extent. of thefirst-mentioned sliding movement of the holding member, means forimparting a variable rotarT movement to the aforesaid stop member toplace a selected stop thereof into operative position, said meanscomprising a gearing lconnected to the rotatable member, a. pivoted.member operatively connected to the gearing for actuating the same,.and having a stepped portion, and key-levers located` above the stepsof the pivoted member, and adapted to engage .the same to impart avariable swing to said member.

4. In an escapement mechanism, the combination with a carriage having alfeed raelr and feeding means; of :i rotatable shaft eX.- tendingparallel to the feed rack, asleeve rotatable on the shaft and having atooth adapted to engage the feed racksaid tooth normally engaging thefeed rack and being slidable in the direction of the length thereof, astop on the sleeve for the sliding tooth,

an adjustable stop on the shaft for the slit ing tooth to determine'theextent of the slid.

ing movement. thereof, means for rotating `the sleeve tol alternatelyengage the teeth With and to disengage the same from the feed rack, andmeans for rotating the shaft to adjust the stop carried thereby.

5. In an escapement mechanism, the coin-l and feeding' means; .of "arotatable-shaft ex-v y tending parallel `tothefeedy rack, a sleeverota-tableon the shaft and having a tooth adapted to engage the feedrack, said tooth normally engaging thefeed rack and being. slidableinthe direction of .the length thereof, a stop on the .sleeve for thesliding tooth, a stepped member fixed to the. shaft, the

steps of said meinberbeing spaced different distances from thelslidabletooth todetermine the extent. of the sliding."ino-vement thereof,meansfor rotating the sleeve to alternately'engage the teeth with. andto disengagethe same fromthe feedrack, and means .for rotating theshaft'to place a selected step of the aforesaid member linto op-lerative position.

6. In `an escapeinent mechanism, the comv bination with a carriagehaving a feed rack and feeding means; of ai'otatable shaft extendingparallel `to the .feed rack, a sleeve i rotatable on the "shaft andhaving a `tooth adaptedto engage `the feed rack, said toothI normallyengagingthe feed rack andflie'ing slidable in the.` direction ofthelength thereof, a stop on the sleeve for the-sliding tooth, a steppedmember fixed tex/the, shaft, .the

steps `of said member being ,spaced different'v distances from theslidabletooth` to '.detery mine the extentloffthe sliding movementthereof, meansfor rotating the sleeve to al`-`` ternately engage theteeth v,with andto disengage'the same from the feed rack, andv l meansfor rotating the shaft` to place a selectedstep'of the. aforesaid memberyinto operative position, said means vcomprising a gearing connected 'tothe shaft, aipivoted` member operatively connected tothe `gearinge foractuating the same, and having 'astepped portion, and key-levers abovethe steps of. the pivoted member, and adapted to engagev the sametoimpart al variable swing to .said

7. In an escapement mechanism, theeombination 'With-a carriagehavingf afeed rack.

and feeding means; of a rotatable shaft-extendingparallel tovthefeedracliya sleeve .A

rotatable on the shaft and. having a tooth adapted to engage the feedrack, said tooth. normally engaging the feed rack and being slidable inthe direction of the length thereof, a stop on the sleeve forthe slidingtooth, a. stepped member fixed to 'the shaft, .the steps of said memberbeing spaced different distances from the slidable tooth to deter-i iinethe extent of the sliding movement thereof, means for rotating thesleeve to alternately engage the teeth with and to disengage the samefrom the feed rack, and means for imparting a variable rotary motion tothe shaft to place a. selected step of theaforesaid member intooperative position. v

- 8. In an escapement mechanism, the com-- binatin with a carriagehaving a feed rack and'feeding means; of a rotatable shaft extendingparallel to the feed rack, a sleeve rotatable on the shaft and having atooth adapted to 'engage thefeed rack, said tooth normally engaging thefeedrack and being bination with a. carnage having a feed 'rack andVfeed-ing means; of'a-rotatable shaft extending parallel to the -feedrack, a sleeve .rotatable on theshaft and having avtooth i adaptedtogengage the feed rack, said tooth be1ngi .o1 1"2 one' endof thelsleeve, andy said I.end ofthe' sleeve having ay notch adjacent to...thetoothysaid tooth normally seating in the ynotch and engagi'ngthefeed rack, and j beingslidablein the directionof the lengththereof, anadjustable stop the sliding movement thereof, means for rotating thesleeve to alternately engage the teeth Vwith and to disengage the sameAfrom ,the feedfraclz,.and means for rotating the shaft to yadjust thestop carried thereby.

10. In.` an escapement mechanism, the coinbination with'a carriagehaving a feed rack and feeding means; of a rotatableshaftextending-parallel to. the feed rack, a sleeve rotata'ble `onthejfshaft and having a tooth adaptedto engage the` feedrack, said tooth.normally engaging the feed rack and being -slidable in thedirection ofthe length there-` of, a stop on the .sleeve for the sliding tooth,

an adjustable stop on the -shaft for the sliding 'tooth to ldeterminethe s'lidingvmovement thereof, means for rotating'the shaft toadjust thestop carried extent of the'I thereby, said means comprising a gearingconnected to the shaft, a pivoted member operatively connected to thegearing for actuating the same' and having a stepped portion, andkey-levers above the steps of the pivoted member and adapted' to engagethe same to impart avariable swing to said member, and means forrotating'the sleeve to alternately engage the -teeth with and todisengage the same from the feed rack, said means comprising a ygearingconnected to the sleeve, and a pivotedfmember operatively connected tosaid gearing, said member being in the path of the first-mentionedswinging member and actuated thereby.

11. In an escapement mechanism, the combination' with a carriagehaving'a feed rack and feeding means; iof forthe feed rack swingingtransversely thereof, a second holding member swinging transversely andslidable in the direction of the length of the feed rack, said secondholding member normally engaging the feed rack to lock the carriage,stops between which the second holding member is slidable, Oney of saidstops being ixed'and the other stop being adjustable to determine thelextent of thev sliding movement ofthe memon the shaft for be .theslidingtoothto determine theextent Iof 'r, means for setting theadjustable stop, means for releasing 'the second vvholding member fromthe feed rack and engag'in the other holding member therewith, yield--ing means for `sliding the second holding member against the `adjustablestop -When thus released from thefeed rack, and means forV releasing thefirst-mentioned holding member from the feed rack` and restoring `thesecond holding member to engagement therewith to effect the release ofthecarriage, said. second holding member traveling with the carriage andlockingthe same upon engaging the first-mentioned stop.

' In testimony whereof I aiiix my signature in presence of twowitnesses.

i OWEN MCCANN. Witnesses:

LEE SHAQKELFORD, L. DAUGBERTY.-

a holding member

